I'm sure it will be great for servers (that can be as loud as you want it seems), but my more important concern putting this in the hands of consumers is if it will be fragile. It's essentially a flywheel with fins, and it would likely carry more momentum than spinning hard drive platters, so dropping or knocking over a device that uses this type of heat sink won't be pretty.

__________________"The computer programmer says they should drive the car around the block and see if the tire fixes itself." [src]